1251242 has 4 divisors (see below), whose sum is σ = 1876866. Its totient is φ = 625620.

The previous prime is 1251227. The next prime is 1251247. The reversal of 1251242 is 2421521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2421521 = 859 ⋅2819.

It can be written as a sum of positive squares in only one way, i.e., 687241 + 564001 = 829^2 + 751^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1251242.

It is not an unprimeable number, because it can be changed into a prime (1251247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312809 + ... + 312812.

2^1251242 is an apocalyptic number.

1251242 is a deficient number, since it is larger than the sum of its proper divisors (625624).

1251242 is an equidigital number, since it uses as much as digits as its factorization.

1251242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625623.

The product of its digits is 160, while the sum is 17.

The square root of 1251242 is about 1118.5892901329. The cubic root of 1251242 is about 107.7574001302.

Adding to 1251242 its reverse (2421521), we get a palindrome (3672763).

The spelling of 1251242 in words is "one million, two hundred fifty-one thousand, two hundred forty-two".